Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban doan » ban doanh, ban dan, ban soan
cua tre » cua te, cuu tre, cua triet
doan vi » doan va, don vi, doan thi
cac ban » cac dan, cac van, can ban
va tham » van tham, va cham, va thanh
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
tu sac » tu sach, tu cac, tu san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky lang xa hoi. hieu ((ve cac) or (va tham)) cac ban doan vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu ((ve cac) OR (va tham)) cac ban doan vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu ((ve cac) or (va tham)) cac ban doan vi ((cua tre) or (su triet))*.